Modifying our code

We are going to need to add several new classes for this chapter. Obviously, if we want a camera in our game, we will need to add a Camera class. In previous versions of the code, the rendering was done through direct calls to SDL. Because SDL does not have a camera as a part of the API, we will need to add a RenderManager class that will act as an intermediate step in our rendering process. This class will use the position of the camera to determine where on our canvas we will be rendering our game object. We will be increasing our gameplay area to four screens wide and four screens high. This creates a gameplay problem, because now, we will need to be able to find the enemy spaceship when we play. To solve this problem, we will need to create a locator user interface (UI) element that points an arrow in the direction of the enemy spaceship. 

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